Title :
New linearization method for the modulated signals with high peak-to-average ratio: peak-to-average ratio reduction and expansion
Author :
Youngoo Yang ; Young Yun Woo ; Jeonghyeon Cha ; Jaehyok Yi ; Bumman Kim
Author_Institution :
Dept. of Electron. & Electr. Eng., Pohang Inst. of Sci. & Technol., South Korea
Abstract :
A new linearization method for the high power amplifier modulated by a high peak-to-average ratio signal is proposed. The amplifier consists of a high power amplifier with a predistorter, a peak power limiter, and cancellation loops similar to the feedforward amplifier. The linearization performance is enhanced by reducing the peak input power to the amplifier using a rate limiter and the distortion from the limited signal is restored at the cancellation sub-path. Simulation and experimental results for the amplifier module with WCDMA signal show a significant improvement of ACLR.
Keywords :
code division multiple access; linearisation techniques; modulation; power amplifiers; ACLR; WCDMA signal modulation; cancellation loop; high power amplifier; linearization method; peak power limiter; peak-to-average ratio; peak-to-average ratio reduction and expansion; predistorter; rate limiter; Circuits; High power amplifiers; Linearity; Multiaccess communication; Operational amplifiers; Peak to average power ratio; Power amplifiers; Power system restoration; Signal restoration; Statistics;
Conference_Titel :
Microwave Symposium Digest, 2002 IEEE MTT-S International
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-7239-5
DOI :
10.1109/MWSYM.2002.1011745
